function Xdev_all = load_all_dev_data()
    Xdev_all = cell(8,1);
    [Xdev_all{1}, ~] = read_pc('../../../data/halS1_dev.X', '../../../data/dev.Y48');
    [Xdev_all{2}, ~] = read_pc('../../../data/halS2_dev.X', '../../../data/dev.Y48');
    [Xdev_all{3}, ~] = read_pc('../../../data/halS3_dev.X', '../../../data/dev.Y48');
    [Xdev_all{4}, ~] = read_pc('../../../data/halS4_dev.X', '../../../data/dev.Y48');
    [Xdev_all{5}, ~] = read_pc('../../../data/halS5_dev.X', '../../../data/dev.Y48');
    [Xdev_all{6}, ~] = read_pc('../../../data/halS6_dev.X', '../../../data/dev.Y48');
    [Xdev_all{7}, ~] = read_pc('../../../data/halS7_dev.X', '../../../data/dev.Y48');
    [Xdev_all{8}, ~] = read_pc('../../../data/halS8_dev.X', '../../../data/dev.Y48');
end

